JPS63169953U

JPS63169953U -

Info

Publication number: JPS63169953U
Application number: JP6327387U
Authority: JP
Priority date: 1987-04-25
Filing date: 1987-04-25
Publication date: 1988-11-04

Description

[Brief explanation of the drawing]

第１，２図は本考案の一実施例としての角度調
整式ヘツドレスト構造を示すもので、第１図はそ
のヘツドレスト角度調整機構を示す要部断面図（
第２図の―矢視断面図）、第２図はその全体
構成を示す斜視図であり、第３，４図は従来の角
度調整式ヘツドレスト構造を示すもので、第３図
はその全体構成を示す斜視図、第４図は第３図の
矢視図である。１……シートバツク、２……ヘツドレスト、２
ａ……ヘツドレストの表皮、３……ステー、４…
…支持部材、４ａ……スプリング、５……ヘツド
レストフレーム、１６……角度調整用シヤフト、
１７……角度調整用プレート、１８……拡径部、
１８ａ……テーパ状案内面、１９……押ボタン部
、２０……リターンスプリング、２１……長穴、
２１ａ……幅広部、２１ｂ……幅狭部、Ｈ……ヘ
ツドレスト角度調整機構。 Figures 1 and 2 show an angle-adjustable headrest structure as an embodiment of the present invention, and Figure 1 is a cross-sectional view of the main parts of the headrest angle adjustment mechanism (
Fig. 2 is a perspective view showing the overall structure, and Fig. 3 and 4 show the conventional angle-adjustable headrest structure, and Fig. 3 is the overall structure. FIG. 4 is a perspective view showing the arrows in FIG. 3. 1...Seat back, 2...Headrest, 2
a... Epidermis of headrest, 3... Stay, 4...
...Support member, 4a... Spring, 5... Head rest frame, 16... Angle adjustment shaft,
17... Angle adjustment plate, 18... Expanded diameter part,
18a...Tapered guide surface, 19...Push button part, 20...Return spring, 21...Elongated hole,
21a...Wide portion, 21b...Narrow width portion, H...Headrest angle adjustment mechanism.

Claims

[Scope of utility model registration request]

A stay erected on the seat back, a support member fixed to the stay, a headrest frame rotatably attached to the support member, and a headrest frame interposed between these support members and the headrest frame. In the headrest structure, the headrest angle adjustment mechanism includes an angle adjustment plate that is fixed to the support member and has a long hole, and a headrest frame that is attached to the headrest frame so as to be able to move forward and backward. and a shaft for angle adjustment inserted into the hole, and the elongated hole has a plurality of wide parts and a narrow part that connects the same wide parts to each other and allows the shaft to pass through. The narrow portion is disposed along an arc around the rotation center of the headrest frame, and the shaft is provided with an enlarged diameter portion having a smaller diameter than the wide portion and a larger diameter than the narrow portion. A return spring is provided for biasing the part toward the elongated hole, and the shaft cooperates with the return spring to cause the enlarged diameter part to be removed from the wide part of the elongated hole in the same manner as when the expanded diameter part is inserted into the wide part of the elongated hole. An angle-adjustable headrest structure, characterized in that it is configured so that it can be in a fixed position.